Final answer:
Polonius demands that his daughter Ophelia stop seeing Hamlet and not communicate with him, believing Hamlet's affections are not genuine.
Step-by-step explanation:
The question asks what demand Polonius makes of his daughter Ophelia. Polonius, a character in Shakespeare's play Hamlet, instructs Ophelia to stop seeing Hamlet and cease any communication with him. Polonius believes Hamlet's advances are insincere and that Ophelia should not trust his affections. This command is significant as it impacts Ophelia's relationship with Hamlet and contributes to the tragic events that unfold within the play.